Ring-cutting machine.



H. AfPEDRICK.

RING CUTTING MACHINE.

APPLICATION FILED JAN-24, 1911.

3 SHEETS-SHEET I.

Q1 /2 26 FT Iii-J N J54.

H. A. PEDRICK.

RING CUTTING MACHINE.

APPLICATION EILED IAN-24. 1911.

Patented Ma 22,1917.

3 SHEETS-SHEET 2.

2w Ham Howard 1/2 H. A. PEDR|CK.

RING CUTTING MACHINE.

APPLICATION HLED JAN.24, 191l- Patented May 22, 1917';

- 3 SHEETS-SHEET 3.

1 a relatively simple, substantial and conven-* no shame ara orrron.

HOWARD A. PEDRIGK, .OF BALA, PENNSYLVANIA, ASSIGNOR T0 PEDRICK TOOL AND macnm'n COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A FIRM CONSISTING OF ALBERT D. PEDRIGK AND HOWARD A. PEDRICK.

/ Y mime-comma MACHINE.

Specification of Letters Patent. Patented May 22, 1917.

Application filed January 24, 1917. Serial No. 144;..206.

To all whom it may concern:

Be it known that I, HOWARD A. PEDRIGK, a citizen of the United States, and a resident of Bala, Montgomery county, Pennsylvania, have invented a Ring-Cutting Machine, of which the following is a specification. 7

One object of my invention is, to provide iently operated machine for simultaneously cutting a series of rings from a blank in the form of a tube ;'the invention contemplating an arrangement of parts whereby it shall be possible to quickly and conveniently adjust the machine to operate on tubes of different dimensions in order to adapt it to form rings of different diameters and widths.

' ameters.

A further object'of the invention is to provide a ring cutting machine with novel means for supporting the tube or blank from which rings are to be formed, which means shall not only be quicklyadjustable to rigidly grip and hold said blank, but shall include a member adapted to removably receive and grip any of a number of'blank carrying elements of different external di- Another object of the invention is to provide a ring sawing machine witha novel construction and arrangement of blank holder and tool support, together with relatively simple and conveniently operated means whereby the distance between these two elements may be quickly and easily adjusted. 4

These objects and other advantageous ends I secure as hereinafter set forth, ref- I erence being had to the accompanying drawings, in which,

Figure 1 is a side elevation of a ring cutsection on 'stantially rectangular in horizontal section;

the upper inside walls of said frame being a vertically movable carriage or cage 4.

Mounted within the upper part of the frame structure 12 is a bracket 5 having a vertically threaded opening for the reception of a threaded spindle 6, fixed to but rotatable in the solid top portion of the carriage 4. Said spindle has fixed to its upper end a hand wheel 7, whereby it is possible to raise or lower the carriage in the frame.

The toppartvof said carriage has journaled in it a horizontally extending shaft 8, on one end of which is fixed a worm wheel 9 meshing with a worm 1O fixed to or formed as part. of a vertical shaft 11 carried in suitable bushings 12 and 13 projecting on one side of the' frame'member 1. The lower end of said shaft 11 has fixed to it a Worm wheel 14 engaged by a worm 15 fixed to a short shaft 16- which likewise carries a pulley wheel 9. The vertical side members of the carrier 4 are slotted to permit of the unobstructed inward projection 1 and 2 respectively.

A hollow tool shaft 18 is mounted in these bearings and extends thr ugh the top of said frame on a line paral el with the shaft 8. Said tool shaft has fixed to it a' pulley 19 connected by a belt 20 with the pulley 19 which in the present instance is formed integral with a spur gear 21 driven from a power shaft 22 through a pinion 23 fixed to the latter in any desired manner.

.. That end of the tool shaft distantfrom I the pulley 19 and gear 21, is formed with a taperingpassage or recess to serve as a chuck for the reception of the correspondingly tapered end of a spindle 24- whose second end is .journaled in a short standard 25 removably mounted on a projecting arm .or table 26 bolted to the side of the frame member 2. This table is provided with a horizontally extending slot for the recep 'tion of the head of a bolt 27 whereby while the standard 25 may be rigidly held in latter outwardly in said slot.

The toolspindle 24; has a fixed collar 28 place, it may be removed at will by slackingolf the nut on said bolt and sliding the between which and a nut 29 are clamped a nite distances apart. The blank carrying spindle 8 extends over the tool spindle 24 and its end is made tapering in form for the reception of a split sleeve 33 having an interior passage formed with the same taper 10 as that of said end. Mounted on this sleeve is a second split sleeve 34 designed to re-' ceive the blank :1: which isin the form of a hollow cylinder or tube. The extremity of the spindle 8 is threaded for the recep- 5 tion of a nut 35, between which and the end of the sleeve 33 is mounted a collar 36.

The above described machine is particularly designed to simultaneously form a number of similar rings for use in the manufacture of piston rings for internal combustion engines and similar machines, and inpreparing my machine for use for this purpose, I place on the tool spindle 24 a series of circular saws or cutters, alternat- 25 ing with them washers 31 whose thickness is substantially equal to the width of the rings which it is desired to form. These saws and washers are then held rigidly.

clamped on the spindle b the'nut 29, and

after the tapering end 0 said spindle has been inserted in the correspondingly formed recess of the tool shaft 18, the standard 25 is engaged with. the end of said spindle. The nut on the bolt 27 is then set up, so that the tool provided by the assembled saws is ready for use.

The tube or blank from which the rings are to be cut is then placed on the sleeve 34, whose external diameter is normally such 0 as to permit its easily entering said blank,

and it likewise is bored to easily fit on the external surface of the second split sleeve 33. These two concentric split sleeves 33 v and 34 with the blank are then mounted on 5 the tapering end 32 of the shaft 8 and after the collar 36 is placed over the threaded end o'f-said shaft, the nut 35 is set up against the end of the sleeve 33. The latter is thus forced onto the tapering end 32 so as to expand it i'and cause it in turn to expand the sleeve 34 which thus rigidly grips and holds the blank :1: from movement.

. Power is then applied to turn the driving shaft 22, which through the pinion 23 and gear 21 turns the tool shaft 18 and the tool comprised by the saws carried by the spindle 24. At the same time power is transmitted from the pulley 19 through the belt 20, pulley 19", shaft 16, worm 15, worm '60 wheel 14, shaft 11, 'worm 10 and worm wheel 9 to the shaft S carried by the car riage 4, which thus turns with the blank m. By suitable rotation of the hand wheel 7 the carriage 4 is then lowered to bring the 5 rotating blank into engagement with the rotating saws and this adjustment is made possible by reason of the peculiar mounting of the worm wheel 9 and worm 10. 1

The driving mechanism and. gearing above described isso designed that the saws are turned at a more rapid rate than is the blank w and that in an opposite direction to said blank, the adjustment of the carriage being such that the saws cut to a depth equal to the thickness of the blank. With this arrangement of parts it is merely necessary for the machine to continue operation for a time sufiicient to permit the blank-carrying shaft 8 to make one complete revolution, since by such an operation the blank is cut into a number of rings which may thereafter be subsequently operated on to give them the finish and other characteristics required of piston rin 'By the above means, it is not on y 'possible to rapidly make a number of similar rings but after the completion of the operation, they may be uickly removed from the machine by slackmg 01f the nut 35 and Obviously, if it be desired to manufacture rings of diiferent sizes from those shown in the drawings, the outer sleeve 34 may be replaced by another sleeve of the required external diameter but having an internal diameter such as to permit it to be easily fitted onto the inner sleeve 33.

The carriage 4 may be conveniently adjusted on the frame not only to permit of the proper engagement of the blank by the saws but also to suit the machine for operation on blanks of different diameters.

I claim 1. The combination of a .hollow frame having an internal ideway; a carriage projecting into said ame and slidable on the guideway; two substantially parallel shafts respectively supported by the carriage and the frame; means for rotating said shafts; a plurality of substantially parallel cutters on one of the shafts; and means on the other shaft for supporting a tubular blank in position to be engaged by said outters simultaneously..

2. The combination of a hollow frame having an internal guideway; a carriage.

projecting into said frame and-slidable on the guideway; two substantially parallel shafts respectively supported by the carriage and the frame; means for rotating said shafts; a plurality of substantially parallel'cutters on one of the shafts; means on the other shaft for supporting a tubular blank in position to be engaged by said outjusting the carriage on the frame to ters simultaneously; with a screw for advary the distance between the shafts.

3. The combination of a hollow frame having an internal guideway; a carriage projecting into the frame and slidable on the guideway; a. bracket having a threaded openmg and mounted within the hollow of the frame in position to project adjacent the carriage; a manually adjustable threaded spindle on the carriage extended within the threaded opening of said bracket; two substantially parallel shafts respectively supon one of the .shafts; means for holding a tubular blank on the other ported by .the carriage and the frame; means for rotating said shafts; a pluralitylof substantially parallel cutters on one of the shafts; and means on the othershaft for supporting a tubular blank in position to be engaged by said cutters simultaneously.

4. The combination of a frame; a carria e movably guided thereon; two parallel shai' ts supported respectively on the carriage and on the frame; a plurality of parallel cutters shaft; means for adjusting the distance between saidshafts; and driv ing means for the shafts including a worm wheel on the carriage-supported shaft and a driven Worm extending in a line parallel, to the line of movement of the. carriage in engagement with said worm wheel.

shafts the carriage on the frame to vary tubular blank on the means for driving said shafts.

5. The combination of a frame; a carria e slidably guided thereon; two parallel sha s respectively carried by the frame and said carriage, one ofthe shafts including a chuck portion; a spindle having one of its ends removably fitting said chuck ortion; means for supporting the other en of said spindle;'a'series of parallel cutters fixed to the spindle so as to turn therewith; means for non-rot'atably holding a tubular blank on the second shaft; and means for driving said sleeve.

7: The combination of a frame; a carriage slidably guided thereon; two parallel shaftsrespectively carried by the frame. and said carriage; .a series of parallel cutters fixed to one of the shafts so as to turn therewith; means for non-rotatably holding a second shaft; and

In witness whereof I aflix my signature.

, ia-QWARD A. PEDRICK. 

